drivers/rtc/ds1337.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2001-2008
  * Copyright 2020 NXP
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  * Keith Outwater, keith_outwater@mvis.com`
  */

 /*
  * Date & Time support (no alarms) for Dallas Semiconductor (now Maxim)
  * DS1337 Real Time Clock (RTC).
  */

 #include <config.h>
 #include <command.h>
 #include <dm.h>
 #include <log.h>
 #include <rtc.h>
 #include <i2c.h>

 /*
  * RTC register addresses
  */
 #if defined CONFIG_RTC_DS1337
 #define RTC_SEC_REG_ADDR	0x0
 #define RTC_MIN_REG_ADDR	0x1
 #define RTC_HR_REG_ADDR		0x2
 #define RTC_DAY_REG_ADDR	0x3
 #define RTC_DATE_REG_ADDR	0x4
 #define RTC_MON_REG_ADDR	0x5
 #define RTC_YR_REG_ADDR		0x6
 #define RTC_CTL_REG_ADDR	0x0e
 #define RTC_STAT_REG_ADDR	0x0f
 #define RTC_TC_REG_ADDR		0x10
 #elif defined CONFIG_RTC_DS1388
 #define RTC_SEC_REG_ADDR	0x1
 #define RTC_MIN_REG_ADDR	0x2
 #define RTC_HR_REG_ADDR		0x3
 #define RTC_DAY_REG_ADDR	0x4
 #define RTC_DATE_REG_ADDR	0x5
 #define RTC_MON_REG_ADDR	0x6
 #define RTC_YR_REG_ADDR		0x7
 #define RTC_CTL_REG_ADDR	0x0c
 #define RTC_STAT_REG_ADDR	0x0b
 #define RTC_TC_REG_ADDR		0x0a
 #endif

 /*
  * RTC control register bits
  */
 #define RTC_CTL_BIT_A1IE	0x1	/* Alarm 1 interrupt enable	*/
 #define RTC_CTL_BIT_A2IE	0x2	/* Alarm 2 interrupt enable	*/
 #define RTC_CTL_BIT_INTCN	0x4	/* Interrupt control		*/
 #define RTC_CTL_BIT_RS1		0x8	/* Rate select 1		*/
 #define RTC_CTL_BIT_RS2		0x10	/* Rate select 2		*/
 #define RTC_CTL_BIT_DOSC	0x80	/* Disable Oscillator		*/

 /*
  * RTC status register bits
  */
 #define RTC_STAT_BIT_A1F	0x1	/* Alarm 1 flag			*/
 #define RTC_STAT_BIT_A2F	0x2	/* Alarm 2 flag			*/
 #define RTC_STAT_BIT_OSF	0x80	/* Oscillator stop flag		*/

 #if !CONFIG_IS_ENABLED(DM_RTC)
 static uchar rtc_read (uchar reg);
 static void rtc_write (uchar reg, uchar val);

 /*
  * Get the current time from the RTC
  */
 int rtc_get (struct rtc_time *tmp)
 {
 	int rel = 0;
 	uchar sec, min, hour, mday, wday, mon_cent, year, control, status;

 	control = rtc_read (RTC_CTL_REG_ADDR);
 	status = rtc_read (RTC_STAT_REG_ADDR);
 	sec = rtc_read (RTC_SEC_REG_ADDR);
 	min = rtc_read (RTC_MIN_REG_ADDR);
 	hour = rtc_read (RTC_HR_REG_ADDR);
 	wday = rtc_read (RTC_DAY_REG_ADDR);
 	mday = rtc_read (RTC_DATE_REG_ADDR);
 	mon_cent = rtc_read (RTC_MON_REG_ADDR);
 	year = rtc_read (RTC_YR_REG_ADDR);

 	/* No century bit, assume year 2000 */
 #ifdef CONFIG_RTC_DS1388
 	mon_cent |= 0x80;
 #endif

 	debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
 		"hr: %02x min: %02x sec: %02x control: %02x status: %02x\n",
 		year, mon_cent, mday, wday, hour, min, sec, control, status);

 	if (status & RTC_STAT_BIT_OSF) {
 		printf ("### Warning: RTC oscillator has stopped\n");
 		/* clear the OSF flag */
 		rtc_write (RTC_STAT_REG_ADDR,
 			   rtc_read (RTC_STAT_REG_ADDR) & ~RTC_STAT_BIT_OSF);
 		rel = -1;
 	}

 	tmp->tm_sec  = bcd2bin (sec & 0x7F);
 	tmp->tm_min  = bcd2bin (min & 0x7F);
 	tmp->tm_hour = bcd2bin (hour & 0x3F);
 	tmp->tm_mday = bcd2bin (mday & 0x3F);
 	tmp->tm_mon  = bcd2bin (mon_cent & 0x1F);
 	tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 2000 : 1900);
 	tmp->tm_wday = bcd2bin ((wday - 1) & 0x07);
 	tmp->tm_yday = 0;
 	tmp->tm_isdst= 0;

 	debug("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
 		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
 		tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

 	return rel;
 }

 /*
  * Set the RTC
  */
 int rtc_set (struct rtc_time *tmp)
 {
 	uchar century;

 	debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
 		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
 		tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

 	rtc_write (RTC_YR_REG_ADDR, bin2bcd (tmp->tm_year % 100));

 	century = (tmp->tm_year >= 2000) ? 0x80 : 0;
 	rtc_write (RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon) | century);

 	rtc_write (RTC_DAY_REG_ADDR, bin2bcd (tmp->tm_wday + 1));
 	rtc_write (RTC_DATE_REG_ADDR, bin2bcd (tmp->tm_mday));
 	rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour));
 	rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min));
 	rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec));

 	return 0;
 }

 /*
  * Reset the RTC.  We also enable the oscillator output on the
  * SQW/INTB* pin and program it for 32,768 Hz output. Note that
  * according to the datasheet, turning on the square wave output
  * increases the current drain on the backup battery from about
  * 600 nA to 2uA. Define CONFIG_RTC_DS1337_NOOSC if you wish to turn
  * off the OSC output.
  */

 #ifdef CONFIG_RTC_DS1337_NOOSC
  #define RTC_DS1337_RESET_VAL \
 	(RTC_CTL_BIT_INTCN | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
 #else
  #define RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
 #endif
 void rtc_reset (void)
 {
 #ifdef CONFIG_RTC_DS1337
 	rtc_write (RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL);
 #elif defined CONFIG_RTC_DS1388
 	rtc_write(RTC_CTL_REG_ADDR, 0x0); /* hw default */
 #endif
 #ifdef CONFIG_RTC_DS1339_TCR_VAL
 	rtc_write (RTC_TC_REG_ADDR, CONFIG_RTC_DS1339_TCR_VAL);
 #endif
 #ifdef CONFIG_RTC_DS1388_TCR_VAL
 	rtc_write(RTC_TC_REG_ADDR, CONFIG_RTC_DS1388_TCR_VAL);
 #endif
 }

 /*
  * Helper functions
  */

 static
 uchar rtc_read (uchar reg)
 {
 	return (i2c_reg_read (CFG_SYS_I2C_RTC_ADDR, reg));
 }

 static void rtc_write (uchar reg, uchar val)
 {
 	i2c_reg_write (CFG_SYS_I2C_RTC_ADDR, reg, val);
 }
 #else
 static uchar rtc_read(struct udevice *dev, uchar reg)
 {
 	return dm_i2c_reg_read(dev, reg);
 }

 static void rtc_write(struct udevice *dev, uchar reg, uchar val)
 {
 	dm_i2c_reg_write(dev, reg, val);
 }

 static int ds1337_rtc_get(struct udevice *dev, struct rtc_time *tmp)
 {
 	int rel = 0;
 	uchar sec, min, hour, mday, wday, mon_cent, year, control, status;

 	control = rtc_read(dev, RTC_CTL_REG_ADDR);
 	status = rtc_read(dev, RTC_STAT_REG_ADDR);
 	sec = rtc_read(dev, RTC_SEC_REG_ADDR);
 	min = rtc_read(dev, RTC_MIN_REG_ADDR);
 	hour = rtc_read(dev, RTC_HR_REG_ADDR);
 	wday = rtc_read(dev, RTC_DAY_REG_ADDR);
 	mday = rtc_read(dev, RTC_DATE_REG_ADDR);
 	mon_cent = rtc_read(dev, RTC_MON_REG_ADDR);
 	year = rtc_read(dev, RTC_YR_REG_ADDR);

 	/* No century bit, assume year 2000 */
 #ifdef CONFIG_RTC_DS1388
 	mon_cent |= 0x80;
 #endif

 	debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x\n",
 	      year, mon_cent, mday, wday);
 	debug("hr: %02x min: %02x sec: %02x control: %02x status: %02x\n",
 	      hour, min, sec, control, status);

 	if (status & RTC_STAT_BIT_OSF) {
 		printf("### Warning: RTC oscillator has stopped\n");
 		/* clear the OSF flag */
 		rtc_write(dev, RTC_STAT_REG_ADDR,
 			  rtc_read(dev, RTC_STAT_REG_ADDR) & ~RTC_STAT_BIT_OSF);
 		rel = -1;
 	}

 	tmp->tm_sec = bcd2bin(sec & 0x7F);
 	tmp->tm_min = bcd2bin(min & 0x7F);
 	tmp->tm_hour = bcd2bin(hour & 0x3F);
 	tmp->tm_mday = bcd2bin(mday & 0x3F);
 	tmp->tm_mon  = bcd2bin(mon_cent & 0x1F);
 	tmp->tm_year = bcd2bin(year) + ((mon_cent & 0x80) ? 2000 : 1900);
 	tmp->tm_wday = bcd2bin((wday - 1) & 0x07);
 	tmp->tm_yday = 0;
 	tmp->tm_isdst = 0;

 	debug("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
 	      tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
 	      tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

 	return rel;
 }

 static int ds1337_rtc_set(struct udevice *dev, const struct rtc_time *tmp)
 {
 	uchar century;

 	debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
 	      tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
 	      tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

 	rtc_write(dev, RTC_YR_REG_ADDR, bin2bcd(tmp->tm_year % 100));

 	century = (tmp->tm_year >= 2000) ? 0x80 : 0;
 	rtc_write(dev, RTC_MON_REG_ADDR, bin2bcd(tmp->tm_mon) | century);

 	rtc_write(dev, RTC_DAY_REG_ADDR, bin2bcd(tmp->tm_wday + 1));
 	rtc_write(dev, RTC_DATE_REG_ADDR, bin2bcd(tmp->tm_mday));
 	rtc_write(dev, RTC_HR_REG_ADDR, bin2bcd(tmp->tm_hour));
 	rtc_write(dev, RTC_MIN_REG_ADDR, bin2bcd(tmp->tm_min));
 	rtc_write(dev, RTC_SEC_REG_ADDR, bin2bcd(tmp->tm_sec));

 	return 0;
 }

 #ifdef CONFIG_RTC_DS1337_NOOSC
  #define RTC_DS1337_RESET_VAL \
 	(RTC_CTL_BIT_INTCN | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
 #else
  #define RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
 #endif
 static int ds1337_rtc_reset(struct udevice *dev)
 {
 #ifdef CONFIG_RTC_DS1337
 	rtc_write(dev, RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL);
 #elif defined CONFIG_RTC_DS1388
 	rtc_write(dev, RTC_CTL_REG_ADDR, 0x0); /* hw default */
 #endif
 #ifdef CONFIG_RTC_DS1339_TCR_VAL
 	rtc_write(dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1339_TCR_VAL);
 #endif
 #ifdef CONFIG_RTC_DS1388_TCR_VAL
 	rtc_write(dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1388_TCR_VAL);
 #endif
 	return 0;
 }

 static const struct rtc_ops ds1337_rtc_ops = {
 	.get = ds1337_rtc_get,
 	.set = ds1337_rtc_set,
 	.reset = ds1337_rtc_reset,
 };

 static const struct udevice_id ds1337_rtc_ids[] = {
 	{ .compatible = "ds1337" },
 	{ .compatible = "ds1338" },
 	{ .compatible = "ds1339" },
 	{ }
 };

 U_BOOT_DRIVER(rtc_ds1337) = {
 	.name   = "rtc-ds1337",
 	.id     = UCLASS_RTC,
 	.of_match = ds1337_rtc_ids,
 	.ops    = &ds1337_rtc_ops,
 };
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* (C) Copyright 2001-2008
	* Copyright 2020 NXP
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	* Keith Outwater, keith_outwater@mvis.com`
	*/

	/*
	* Date & Time support (no alarms) for Dallas Semiconductor (now Maxim)
	* DS1337 Real Time Clock (RTC).
	*/

	#include <config.h>
	#include <command.h>
	#include <dm.h>
	#include <log.h>
	#include <rtc.h>
	#include <i2c.h>

	/*
	* RTC register addresses
	*/
	#if defined CONFIG_RTC_DS1337
	#define RTC_SEC_REG_ADDR 0x0
	#define RTC_MIN_REG_ADDR 0x1
	#define RTC_HR_REG_ADDR 0x2
	#define RTC_DAY_REG_ADDR 0x3
	#define RTC_DATE_REG_ADDR 0x4
	#define RTC_MON_REG_ADDR 0x5
	#define RTC_YR_REG_ADDR 0x6
	#define RTC_CTL_REG_ADDR 0x0e
	#define RTC_STAT_REG_ADDR 0x0f
	#define RTC_TC_REG_ADDR 0x10
	#elif defined CONFIG_RTC_DS1388
	#define RTC_SEC_REG_ADDR 0x1
	#define RTC_MIN_REG_ADDR 0x2
	#define RTC_HR_REG_ADDR 0x3
	#define RTC_DAY_REG_ADDR 0x4
	#define RTC_DATE_REG_ADDR 0x5
	#define RTC_MON_REG_ADDR 0x6
	#define RTC_YR_REG_ADDR 0x7
	#define RTC_CTL_REG_ADDR 0x0c
	#define RTC_STAT_REG_ADDR 0x0b
	#define RTC_TC_REG_ADDR 0x0a
	#endif

	/*
	* RTC control register bits
	*/
	#define RTC_CTL_BIT_A1IE 0x1 /* Alarm 1 interrupt enable */
	#define RTC_CTL_BIT_A2IE 0x2 /* Alarm 2 interrupt enable */
	#define RTC_CTL_BIT_INTCN 0x4 /* Interrupt control */
	#define RTC_CTL_BIT_RS1 0x8 /* Rate select 1 */
	#define RTC_CTL_BIT_RS2 0x10 /* Rate select 2 */
	#define RTC_CTL_BIT_DOSC 0x80 /* Disable Oscillator */

	/*
	* RTC status register bits
	*/
	#define RTC_STAT_BIT_A1F 0x1 /* Alarm 1 flag */
	#define RTC_STAT_BIT_A2F 0x2 /* Alarm 2 flag */
	#define RTC_STAT_BIT_OSF 0x80 /* Oscillator stop flag */

	#if !CONFIG_IS_ENABLED(DM_RTC)
	static uchar rtc_read (uchar reg);
	static void rtc_write (uchar reg, uchar val);

	/*
	* Get the current time from the RTC
	*/
	int rtc_get (struct rtc_time *tmp)
	{
	int rel = 0;
	uchar sec, min, hour, mday, wday, mon_cent, year, control, status;

	control = rtc_read (RTC_CTL_REG_ADDR);
	status = rtc_read (RTC_STAT_REG_ADDR);
	sec = rtc_read (RTC_SEC_REG_ADDR);
	min = rtc_read (RTC_MIN_REG_ADDR);
	hour = rtc_read (RTC_HR_REG_ADDR);
	wday = rtc_read (RTC_DAY_REG_ADDR);
	mday = rtc_read (RTC_DATE_REG_ADDR);
	mon_cent = rtc_read (RTC_MON_REG_ADDR);
	year = rtc_read (RTC_YR_REG_ADDR);

	/* No century bit, assume year 2000 */
	#ifdef CONFIG_RTC_DS1388
	mon_cent \|= 0x80;
	#endif

	debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
	"hr: %02x min: %02x sec: %02x control: %02x status: %02x\n",
	year, mon_cent, mday, wday, hour, min, sec, control, status);

	if (status & RTC_STAT_BIT_OSF) {
	printf ("### Warning: RTC oscillator has stopped\n");
	/* clear the OSF flag */
	rtc_write (RTC_STAT_REG_ADDR,
	rtc_read (RTC_STAT_REG_ADDR) & ~RTC_STAT_BIT_OSF);
	rel = -1;
	}

	tmp->tm_sec = bcd2bin (sec & 0x7F);
	tmp->tm_min = bcd2bin (min & 0x7F);
	tmp->tm_hour = bcd2bin (hour & 0x3F);
	tmp->tm_mday = bcd2bin (mday & 0x3F);
	tmp->tm_mon = bcd2bin (mon_cent & 0x1F);
	tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 2000 : 1900);
	tmp->tm_wday = bcd2bin ((wday - 1) & 0x07);
	tmp->tm_yday = 0;
	tmp->tm_isdst= 0;

	debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

	return rel;
	}

	/*
	* Set the RTC
	*/
	int rtc_set (struct rtc_time *tmp)
	{
	uchar century;

	debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

	rtc_write (RTC_YR_REG_ADDR, bin2bcd (tmp->tm_year % 100));

	century = (tmp->tm_year >= 2000) ? 0x80 : 0;
	rtc_write (RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon) \| century);

	rtc_write (RTC_DAY_REG_ADDR, bin2bcd (tmp->tm_wday + 1));
	rtc_write (RTC_DATE_REG_ADDR, bin2bcd (tmp->tm_mday));
	rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour));
	rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min));
	rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec));

	return 0;
	}

	/*
	* Reset the RTC. We also enable the oscillator output on the
	* SQW/INTB* pin and program it for 32,768 Hz output. Note that
	* according to the datasheet, turning on the square wave output
	* increases the current drain on the backup battery from about
	* 600 nA to 2uA. Define CONFIG_RTC_DS1337_NOOSC if you wish to turn
	* off the OSC output.
	*/

	#ifdef CONFIG_RTC_DS1337_NOOSC
	#define RTC_DS1337_RESET_VAL \
	(RTC_CTL_BIT_INTCN \| RTC_CTL_BIT_RS1 \| RTC_CTL_BIT_RS2)
	#else
	#define RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 \| RTC_CTL_BIT_RS2)
	#endif
	void rtc_reset (void)
	{
	#ifdef CONFIG_RTC_DS1337
	rtc_write (RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL);
	#elif defined CONFIG_RTC_DS1388
	rtc_write(RTC_CTL_REG_ADDR, 0x0); /* hw default */
	#endif
	#ifdef CONFIG_RTC_DS1339_TCR_VAL
	rtc_write (RTC_TC_REG_ADDR, CONFIG_RTC_DS1339_TCR_VAL);
	#endif
	#ifdef CONFIG_RTC_DS1388_TCR_VAL
	rtc_write(RTC_TC_REG_ADDR, CONFIG_RTC_DS1388_TCR_VAL);
	#endif
	}

	/*
	* Helper functions
	*/

	static
	uchar rtc_read (uchar reg)
	{
	return (i2c_reg_read (CFG_SYS_I2C_RTC_ADDR, reg));
	}

	static void rtc_write (uchar reg, uchar val)
	{
	i2c_reg_write (CFG_SYS_I2C_RTC_ADDR, reg, val);
	}
	#else
	static uchar rtc_read(struct udevice *dev, uchar reg)
	{
	return dm_i2c_reg_read(dev, reg);
	}

	static void rtc_write(struct udevice *dev, uchar reg, uchar val)
	{
	dm_i2c_reg_write(dev, reg, val);
	}

	static int ds1337_rtc_get(struct udevice dev, struct rtc_time tmp)
	{
	int rel = 0;
	uchar sec, min, hour, mday, wday, mon_cent, year, control, status;

	control = rtc_read(dev, RTC_CTL_REG_ADDR);
	status = rtc_read(dev, RTC_STAT_REG_ADDR);
	sec = rtc_read(dev, RTC_SEC_REG_ADDR);
	min = rtc_read(dev, RTC_MIN_REG_ADDR);
	hour = rtc_read(dev, RTC_HR_REG_ADDR);
	wday = rtc_read(dev, RTC_DAY_REG_ADDR);
	mday = rtc_read(dev, RTC_DATE_REG_ADDR);
	mon_cent = rtc_read(dev, RTC_MON_REG_ADDR);
	year = rtc_read(dev, RTC_YR_REG_ADDR);

	/* No century bit, assume year 2000 */
	#ifdef CONFIG_RTC_DS1388
	mon_cent \|= 0x80;
	#endif

	debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x\n",
	year, mon_cent, mday, wday);
	debug("hr: %02x min: %02x sec: %02x control: %02x status: %02x\n",
	hour, min, sec, control, status);

	if (status & RTC_STAT_BIT_OSF) {
	printf("### Warning: RTC oscillator has stopped\n");
	/* clear the OSF flag */
	rtc_write(dev, RTC_STAT_REG_ADDR,
	rtc_read(dev, RTC_STAT_REG_ADDR) & ~RTC_STAT_BIT_OSF);
	rel = -1;
	}

	tmp->tm_sec = bcd2bin(sec & 0x7F);
	tmp->tm_min = bcd2bin(min & 0x7F);
	tmp->tm_hour = bcd2bin(hour & 0x3F);
	tmp->tm_mday = bcd2bin(mday & 0x3F);
	tmp->tm_mon = bcd2bin(mon_cent & 0x1F);
	tmp->tm_year = bcd2bin(year) + ((mon_cent & 0x80) ? 2000 : 1900);
	tmp->tm_wday = bcd2bin((wday - 1) & 0x07);
	tmp->tm_yday = 0;
	tmp->tm_isdst = 0;

	debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

	return rel;
	}

	static int ds1337_rtc_set(struct udevice dev, const struct rtc_time tmp)
	{
	uchar century;

	debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

	rtc_write(dev, RTC_YR_REG_ADDR, bin2bcd(tmp->tm_year % 100));

	century = (tmp->tm_year >= 2000) ? 0x80 : 0;
	rtc_write(dev, RTC_MON_REG_ADDR, bin2bcd(tmp->tm_mon) \| century);

	rtc_write(dev, RTC_DAY_REG_ADDR, bin2bcd(tmp->tm_wday + 1));
	rtc_write(dev, RTC_DATE_REG_ADDR, bin2bcd(tmp->tm_mday));
	rtc_write(dev, RTC_HR_REG_ADDR, bin2bcd(tmp->tm_hour));
	rtc_write(dev, RTC_MIN_REG_ADDR, bin2bcd(tmp->tm_min));
	rtc_write(dev, RTC_SEC_REG_ADDR, bin2bcd(tmp->tm_sec));

	return 0;
	}

	#ifdef CONFIG_RTC_DS1337_NOOSC
	#define RTC_DS1337_RESET_VAL \
	(RTC_CTL_BIT_INTCN \| RTC_CTL_BIT_RS1 \| RTC_CTL_BIT_RS2)
	#else
	#define RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 \| RTC_CTL_BIT_RS2)
	#endif
	static int ds1337_rtc_reset(struct udevice *dev)
	{
	#ifdef CONFIG_RTC_DS1337
	rtc_write(dev, RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL);
	#elif defined CONFIG_RTC_DS1388
	rtc_write(dev, RTC_CTL_REG_ADDR, 0x0); /* hw default */
	#endif
	#ifdef CONFIG_RTC_DS1339_TCR_VAL
	rtc_write(dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1339_TCR_VAL);
	#endif
	#ifdef CONFIG_RTC_DS1388_TCR_VAL
	rtc_write(dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1388_TCR_VAL);
	#endif
	return 0;
	}

	static const struct rtc_ops ds1337_rtc_ops = {
	.get = ds1337_rtc_get,
	.set = ds1337_rtc_set,
	.reset = ds1337_rtc_reset,
	};

	static const struct udevice_id ds1337_rtc_ids[] = {
	{ .compatible = "ds1337" },
	{ .compatible = "ds1338" },
	{ .compatible = "ds1339" },
	{ }
	};

	U_BOOT_DRIVER(rtc_ds1337) = {
	.name = "rtc-ds1337",
	.id = UCLASS_RTC,
	.of_match = ds1337_rtc_ids,
	.ops = &ds1337_rtc_ops,
	};
	#endif